AWS Compute Essentials

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You are a developer who is tasked with creating a new feature for a web application that's hosted on Amazon EC2.  The web application is an online store and all the items being sold in the store are loaded into a database manually behind the scenes.

This process takes a long time, isn't very scalable, and is prone to error.  You are tasked with automating the process of getting the new items information loaded into the inventory database.  The goal is to have a person upload an inventory spreadsheet into Amazon S3, the object storage service, and then have a process automatically load the data into the inventory database.

Which compute service would you use to host the processing logic to load the items from the file into the database.

You have an application currently hosted in your on-premises data center that needs to be migrated to AWS.  The application is currently running on Linux servers in the data center, and you want to minimize the amount of refactoring that's needed to migrate to AWS.  it's important that this workload is elastic and can support varying demand.  Which compute option would you choose?

You are planning to write a brand-new application by using a microservices or service-oriented design.  You also want to architect the application where it can scale up or down quickly, and you want to lower the risk of deploying new changes to production.  Which AWS compute service would you use?